NAOJ GW Elog Logbook 3.2
Displaying report 1-1 of 1.
ShalikaSingh - 12:10, Tuesday 14 November 2023 (3345)
BS cal (front and back face)
[13/11/2023]
Due to the position of clamp there was trouble calibrating the back face of BS(from 3342). The mount was changed. Previously we had mounted two different BS on two different mounts. So, in brief this is the second BS.
The BS is mounted on a magnetic mount, so just the upper half of mount was rotated such that the actual position of beam on BS doesn't change. This was best suited to calibrate both front and back face of BS. Even though the BS was rotated to calibrate two faces, the path of transmission and reflection doesn't change. The parameters obtained are as follows:
Input azimuth: -0.014+/-0.009
Input ellipticity: 0.008+/-0.008
| Parameters | Front face (center) | Back Face (Center) |
| Reflection (%) | 56.5 ± 1.1 | 47.7 ± 0.8 |
| Transmission (%) | 40.8 ± 0.7 | 40.7 ± 0.7 |
| Loss (%) | 2.7 ± 1.7 | 11.6 ± 1.5 |
| Reflected Azimuth (°) | 1.4154 ± 0.0022 | 1.6018 ± 0.0023 |
| Transmitted Azimuth (°) | -0.060 ± 0.0027 | -0.0939 ± 0.0020 |
| Reflected ellitpticity (°) | -0.3969 ± -0.3969 | -0.1469 ± 0.0026 |
| Transmittted ellipticity(°) | 0.2928 ± 0.0028 | -0.0549 ± 0.0021 |
| 5.0 ± 1.1 |
| 5.0 ± 1.1 |
| 41.02 ± 0.33 |